Before launching the scan press the Settings button, choose the SMBus / I2C. Then you can either disable the entire "GPU I2C Support", which might cause you not to see additional GPU sensors if present. Better solution would be in the "GPU I2C Bus Exclusion" box to check the box with number 6. That should fix the sensor-only mode.
There might be an additional issue causing the freezing. There seems to be some USB device causing that. If that happens, try to unplug your USB devices to see if that helps.
Please let me know the results...